p9221-r-evk evaluation board user manual

P9221-R-EVK Evaluation Board User Manual

© 2017 Integrated Device Technology, Inc. 1 December 18, 2017

P9242-R-EVK MM Evaluation Board (Transmitter)

Transmitter Coil

P9221-R-EVK MM

Evaluation Board

(Receiver)

Description

The IDT P9221-R-EVK Mass-Market (MM) Evaluation Board dem-onstrates the features and performance of the P9221-R 15W Wireless Power Receiver (Rx). The P9221-R-EVK offers the flexi-bility to program parameters, such as the output voltage, over-current limit threshold, and external temperature sensing function. It also allows tuning the Foreign Object Detection (FOD) feature by varying values in the resistor divider connected to the VOSET/ Q-Fact pin.

The P9221-R-EVK MM Evaluation Board is designed to function as the receiver in a wireless power transfer system using IDT’s P9242-R-EVK MM Evaluation Board as the power transmitter. The P9242-R-EVK is ordered separately. The P9221-R-EVK can also be usedwith the user’s WPC-1.2 compliant transmitter.

The high-efficiency, turnkey reference design is supported by comprehensive online, digital resources to significantly expedite design-in effort and enable rapid prototyping. The printed circuit board (PCB) has four layers. The total active area is optimized to 28mm x 15mm.

Kit Contents

P9221-R-EVK Mass-Market Evaluation Board

Features

P9221-R-EVK MM Evaluation Board supports WPC-1.2

Up to 15W output power

Selectable output voltage: 12V or 9V

Adjustable over-current limit

External FOD tuning

Power transfer LED indicator

Alignment guide information using the PCB coils

4-layer PCB

Total active area: 420mm2

Fully assembled with test points and coil fixture

P9221-R-EVK MM Evaluation Board

Wireless Power Transfer System using the P9221-R-EVK and P9242-R-EVK



Important Notes

Disclaimer

Integrated Device Technology, Inc. and its affiliated companies (herein referred to as “IDT”) shall not be liable for any damages arising out of defects resulting from

(i) delivered hardware or software

(ii) non-observance of instructions contained in this manual and in any other documentation provided to user, or

(iii) misuse, abuse, use under abnormal conditions, or alteration by anyone other than IDT.

TO THE EXTENT PERMITTED BY LAW, IDT HEREBY EXPRESSLY DISCLAIMS AND USER EXPRESSLY WAIVES ANY AND ALL WARRANTIES, WHETHER EXPRESS, IMPLIED, OR STATUTORY, INCLUDING, WITHOUT LIMITATION, IMPLIED WARRANTIES OF MERCHANTABILITY AND OF FITNESS FOR A PARTICULAR PURPOSE, STATUTORY WARRANTY OF NON-INFRINGEMENT, AND ANY OTHER WARRANTY THAT MAY ARISE BY REASON OF USAGE OF TRADE, CUSTOM, OR COURSE OF DEALING.

Restrictions in Use

IDT’s P9221-R-EVK Mass Market Evaluation Board is designed for evaluation purposes only. It must not be used for module production or production test setups.

Contents

1. Setup ............................................................................................................................................................................................................4

1.1 Required or Recommended User Equipment ......................................................................................................................................4

1.2 Kit Hardware Connections ...................................................................................................................................................................4

2. Usage Guide .................................................................................................................................................................................................5

2.1 Overview of the P9221-R-EVK ............................................................................................................................................................5

2.2 Setting the Output Voltage and Reference Q-factor Value – VOSET/Q-Fact Pin ...............................................................................6

2.3 Alignment Aid – ALIGNX and ALIGNY ................................................................................................................................................7

2.4 Adjustment of Over-Current Limit ........................................................................................................................................................8

2.5 External Temperature Sensing and End of Charge – TS/EOC ...........................................................................................................9

2.6 Receiver Coil .....................................................................................................................................................................................10

3. P9221-R-EVK MM Evaluation Board Schematics ......................................................................................................................................11

4. Bill of Materials (BOM) ................................................................................................................................................................................12

5. Board Layout ..............................................................................................................................................................................................14

6. Ordering Information ...................................................................................................................................................................................17

7. Revision History ..........................................................................................................................................................................................17



List of Figures

Figure 1. Evaluation Kit Setup using the P9242-R-EVK MM Evaluation Board as the Transmitter ....................................................................4

Figure 2. P9221-R-EVK MM Evaluation Board V2.2 Features ...........................................................................................................................5

Figure 3. R33 and R34 Locations .......................................................................................................................................................................6

Figure 4. Recommended Structure of the X-Y Alignment Coil ............................................................................................................................7

Figure 5. R38 and R22 Location .........................................................................................................................................................................8

Figure 6. Over-Current Limit vs. ILIM Pin Voltage ..............................................................................................................................................9

Figure 7. Optional External Temperature Sensing by Connecting an RTS Thermistor ....................................................................................10

Figure 8. Silkscreen – Top of Board .................................................................................................................................................................14

Figure 9. Silkscreen – Bottom of Board ............................................................................................................................................................14

Figure 10. Top Copper Layer ..............................................................................................................................................................................15

Figure 11. L2 Copper Layer ................................................................................................................................................................................15

Figure 12. L3 Copper Layer ................................................................................................................................................................................16

Figure 13. Bottom Copper Layer ........................................................................................................................................................................16

List of Tables

Table 1. Setting the Output Voltage and Reference Q-factor Value ..................................................................................................................6

Table 2. Setting the Over-Current Limit .............................................................................................................................................................8

Table 3. Recommend Coil Manufacturers .......................................................................................................................................................10

Table 4. P9221-R-EVK MM Evaluation Board BOM V2.2 ...............................................................................................................................12



1. Setup

1.1 Required or Recommended User Equipment

The following additional lab equipment is required for using the kit:

P9242-R-EVK MM Evaluation Board or any WPC-1.2 compliant transmitter

Power supply or 12V/2A AC adaptor

1.2 Kit Hardware Connections

Follow these procedures to set up the kit as shown in Figure 1:

1. Set up the P9242-R-EVK Evaluation Board (or user transmitter) according to the board’s user manual.

2. Place the P9221-R-EVK on the transmitter (TX) pad with the components facing up as shown in Figure 1.

3. Verify that the green LEDs on both boards are illuminated indicating that coupling has been established.

4. Connect wires to the VOUT and GND test points to measure the output voltage and apply a load.

Figure 1. Evaluation Kit Setup using the P9242-R-EVK MM Evaluation Board as the Transmitter

P9242-R-EVK

Transmitter Coil

P9221-R-EVK

Green LEDs illuminate when

connection has been established.



2. Usage Guide

2.1 Overview of the P9221-R-EVK

Figure 2. P9221-R-EVK MM Evaluation Board V2.2 Features

FOD Offset

Adjustment

(RPO)

External Temperature

Sensing Resistor

Output Voltage Adjustment (VOSET)

FOD Gain

Adjustment

(RPG)

Over-Current

Limit Adjustment

(ILIM)

Y- Alignment Guide Voltage (ALGY)

X- Alignment Guide Voltage (ALGX)

SCL SDA GND

GND

VRECT

GND

VOUT

Receiver Coil

IDT P9221-R IC

Interrupt Flag



2.2 Setting the Output Voltage and Reference Q-factor Value – VOSET/Q-Fact Pin

The output voltage on the P9221-R is programmed by connecting the center tap of the divider network comprising external resistors R34 and R33 to the VOSET/Q-Fact pin as shown in the schematic in section 3. The output voltage can be set to 9V or 12V. The recommended settings for R33 and R34 are given in Table 1.

The default output voltage is set to 12V on the P9221-R-EVK MM Evaluation Board (R34 = 10kΩ; R33 = open). For applications where the transmitter is capable of delivering only 5W, the P9221-R will automatically switch to 5V output to ensure 5W power delivery. The 5W option can be disabled by changing R33 as described in Table 1. In this case, if the receiver is placed on a 5W transmitter, the receiver output pin will be high impedance.

The VOSET/Q-Fact pin also allows setting the Q-factor value by adjusting R34 and R33 as shown in Table 1. The default value is set to 103 on the P9221-R-EVK MM Evaluation Board. For development purposes, the Q-factor should be set to 20 to avoid prematurely triggering the Q-factor.

Table 1. Setting the Output Voltage and Reference Q-factor Value

Note: The default values on the P9221-R-EVK are indicated with blue shading.

Q Factor Value Setting

VOUT Setting (R34/R33 Values)

9V without 5V 9V with 5V 12V without 5V 12V with 5V

R34 R33 R34 R33 R34 R33 R34 R33

103 10kΩ 4.87kΩ Open 10kΩ 10kΩ 21kΩ 10kΩ Open

80 10kΩ 4.32kΩ 10kΩ 0.31kΩ 10kΩ 22.6kΩ 10kΩ 324kΩ

60 10kΩ 3.65kΩ 10kΩ 0.681kΩ 10kΩ 27.4kΩ 10kΩ 147kΩ

40 10kΩ 3.09kΩ 10kΩ 1.1kΩ 10kΩ 32.4kΩ 10kΩ 90.9kΩ

20 10kΩ 2.55kΩ 10kΩ 1.54kΩ 10kΩ 39.2kΩ 10kΩ 64.9kΩ

Figure 3. R33 and R34 Locations

R34

R33



2.3 Alignment Aid – ALIGNX and ALIGNY

The signal magnitude on the P9221-R’s ALIGNX and ALIGNY pins provides directional alignment information by measuring the phase between the input power AC signal and the horizontal (ALIGNX) and vertical (ALIGNY) alignment signals. After the signal is measured by the analog-to-digital converter, the alignment information is represented by two 8-bit signed numbers, which can be read via the I2C interface from the Align_X and Align_Y registers (see the P9221-R Datasheet).

The difference in the electromotive force (EMF) voltage of the two coils can be represented by the amount of magnetic flux, which depends on the misalignment position of the receiver coil relative to the transmitter coil. With the combination of two symmetrical coils on the vertical (Y) axis and horizontal (X) axis, it is possible to sense alignment in two dimensions as shown in Figure 4. The trace length and width were designed with 452.12mm and 0.254mm respectively for each segment coil on the P9221-R-EVK MM Evaluation Board, which was assembled with the AMOTECH ASC-504060E00-S00 coil as shown in Figure 4.

Figure 4. Recommended Structure of the X-Y Alignment Coil



2.4 Adjustment of Over-Current Limit

The P9221-R has a programmable current limit function for protecting the device in the event of an over-current or short-circuit fault condition. If the output current exceeds the programed threshold, the P9221-R will limit the load current by reducing the output voltage. The recommended current limit setting is 120% of the maximum output current. The default value for the over-current limit is set to 1.6A. The ILIM pin allows changing the over-current limit value without modification of the firmware by selecting the values of R38 and R22 as shown in Table 2. R38 and R22 form a divider network from the 1.8V supply to ground with the center tap connected to the ILIM pin as shown in the schematic in section 3. The voltage at the ILIM pin sets the over-current limit. See Figure 6 for the relationship between the current limit and the voltage on the ILIM pin.

Table 2. Setting the Over-Current Limit

Note: The default values on the P9221-R-EVK are indicated with blue shading.

Voltage on ILIM Pin [V] R38 [kΩ] R22 [kΩ] Maximum Output

Current [A] Over-Current Limit [A]

Pull-up 10 Open 1.25 1.6

0.60 10 5.1 0.80 1

0.45 10 3.3 0.64 0.8

0.25 10 1.6 0.40 0.5

Figure 5. R38 and R22 Location

R38

R22



Figure 6. Over-Current Limit vs. ILIM Pin Voltage

2.5 External Temperature Sensing and End of Charge – TS/EOC

The P9221-R has a temperature sense input pin, TS, which can be used to monitor a remote temperature, such as a thermistor reading for a coil or a battery charger. The built-in comparator’s reference voltage is 0.6V and 0.1V in the P9221-R, and it is used for monitoring the voltage level on the TS/EOC pin as described by Equation 1.

VTS = VVDD18 ∗ NTC

R19 + NTC

Equation 1

Where NTC is the thermistor`s resistance and R19 is the pull-up resistor connected to the 1.8V supply voltage on the P9221-R-EVK MM Evaluation Board. The over–temperature shutdown is triggered when the TS pin voltage is between 0.6V and 0.1V. The RTS is not populated on the P9221-R MM Evaluation Board.

When the TS/EOC pin is less than 0.1V, the End-of-Charge (EOC) function is activated, and the P9221-R will send the End-Power-Transfer (EPT) packet to the transmitter terminating the power delivery.

0

200

400

600

800

1000

1200

1400

1600

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1

ILIM

[m

A]

VILIM [V]



Figure 7. Optional External Temperature Sensing by Connecting an RTS Thermistor

RTS

2.6 Receiver Coil

The ASC-504060E00-S00 coil is used in the kit. The following alternative coils are recommended for the P9221-R receiver for 15W applications for optimum performance. The recommended vendor coils have been tested and verified as shown in Table 3.

Table 3. Recommend Coil Manufacturers

Output Power Vendor Part Number Inductance at 100kHz ACR at 20°C Series Resonant Capacitance

15W AMOTECH ASC-504060E00-S00 8.2µH 220mΩ 400nF

15W TDK WR424245-13K2-G 11.2µH 170mΩ 300nF

15W SUNLORD SWA50R40H06C02B 8.4µH 150mΩ 400nF

15W WURTH 760308102207 8.0µH 80mΩ 400nF



3. P9221-R-EVK MM Evaluation Board Schematics

D1

LE

D

C1

2

NP

C1

0

10uF

INT

INT

SD

A

C9

3.3

nF

R1

8

NP

VD

D5

V

D6

5.1

VR

80

RS

V1

C2

5N

P

ALG

X

R3

3

NP

R3

9

10k

C1

90

.1u

F

C2

1

10uF

C1

615nF

U1

P9221-R

CO

MM

1A

1

CO

MM

2A

6

RS

V4

B1

RS

V5

B6

EN

B5

ALIGNXA2

SCLA3

VO

SE

T/Q

-Fa

ct

A4

RP

PG

A5

SDAB3

ALIGNYB2

ILIM

B4

RP

PO

C4

DE

NC

5

OU

TD

1

INTC3

SINKC2

OU

T1

D2

OU

T2

D3

OU

T3

D4

OU

T4

D5

OU

T5

D6

VR

EC

TE

1

VR

EC

T1

E2

VR

EC

T2

E5

VR

EC

T3

E6

VR

EC

T4

F2

VR

EC

T5

F3

VR

EC

T6

F4

VR

EC

T7

F5

AC

1G

2

AC

1_

1H

1

AC

1_

2H

2

AC

2G

5

AC

2_

1H

5

AC

2_

2H

6

BS

T1

G1

BS

T2

G6

PGNDC1

PGND1C6

PGND2J1

PGND3J2

PGND4J3

PGND5J4

PGND6J5

PGND7J6

VD

D5

VF

1

VD

D1

8F

6

RSV3G3

RSV2H3

RSV1G4

TS/EOCH4

C2

01uF

/EN

R1

910K

I2C

RA

IL

VO

UT

VO

SE

T

P9221-R MM EV Board V2.2

C3

1

0.1

uF

C8

15nF

VR

EC

T

R3

50

J1

I2C

1 2 3 4 5

L1

SC

L

R2

8N

P

R1

710k

VP

P18

R4

2

NP

VD

D5

V

R2

2

NP

R2

36

R1

45

.1k

C3

10

0n

F/5

0V

RP

O

C1

1

10uF

RSV1

R1

35

.1k

TS

VO

UT

C2

3

0.1

uF

GN

D1

R1

610K

VR

EC

T

R2

9

10K

C7

NP

VO

SN

S

ILIM

R3

410k

R2

3

10k

C2

2

10uF

VD

D5

V

R3

810K

RX Power Coil

AlignX coil

C1

8 1uF

C6

47nF

VP

P18

Vre

ct

R1

5.1

k

ALG

Y

TS

C2

10

0n

F/5

0V

D7

5.1

V

U2

NP

A0

1

A1

2

A2

3

VS

S4

SD

A5

SC

L6

WP

7

VC

C8

E_PAD9

VP

P18

RT

S

NP

VP

P18

C1

10

0n

F/5

0V

AlignY coil

WP

C5

10

0n

F/5

0V

R4

1

NP

LC

SD

A

INT

R2

7

10K

VO

UT

C3

3

10uF

DE

N

R3

0N

P

AC

2T

TS

C1

5N

PG

ND

SC

L

R6

NP

R1

510K

GC

OM

AC

2

RP

G

C1

447nF



4. Bill of Materials (BOM)

Table 4. P9221-R-EVK MM Evaluation Board BOM V2.2

Item Reference Quantity Value Description Part number PCB Footprint

1 AC2T, VDD5V, VPP18, VOSET, TS, SDA, SCL, RPO, RPG, INT, ILIM, GCOM, DEN, ALGY, ALGX, /EN

16 PTH_TP Test Pad

10MIL_35PAD

2 AC2, LC 2 NP TEST POINT

test_pt_sm_135x70

3 C1, C2, C3, C5 4 100nF CAP CER 0.1µF 50V X5R 0402 GRM155R61H104KE19D 0402

4 C6, C14 2 47nF CAP CER 0.047µF 50V X7R 0402 C1005X7R1H473K050BB 0402

5 C7, C15 2 NP CAP CER 0.047µF 50V X7R 0402 C1005X7R1H473K050BB 0402

6 C8, C16 2 15nF CAP CER 0.015µF 50V X7R 0402 GRM155R71H153KA12J 0402

7 C9 1 3.3nF CAP CER 3300PF 50V X7R 0402 CL05B332KB5NNNC 0402

8 C10, C11, C21, C22, C33

5 10µF CAP CER 10µF 25V X5R 0603 CL10A106MA8NRNC 0603

9 C12 1 NP CAP CER 10µF 25V X5R 0603 CL10A106MA8NRNC 0603

10 C18,C20 2 1µF CAP CER 1µF 10V X5R 0402 GRM155R61A105KE15D 0402

11 C19,C31 2 0.1µF CAP CER 0.1µF 10V X5R 0201 C0603X5R1A104K030BC 0201

12 C23 1 0.1µF CAP CER 0.1µF 25V X5R 0201 CL03A104KA3NNNC 0201

13 C25 1 NP CAP CER 0.1µF 10V X5R 0201 C0603X5R1A104K030BC 0201

14 D1 1 LED LED GREEN CLEAR 0603 SMD 150 060 GS7 500 0 0603_diode

15 D6,D7 2 5.1V DIODE ZENER 5.1V 100MW 0201 CZRZ5V1B-HF 0201

16 GND1, VRECT, VOUT, VOSNS, GND

5 Test Point

TEST POINT PC MINIATURE SMT 5015 test_pt_sm_135x70

17 J1 1 I2C HEADER_1X5_0P1PITCH60P42D 68002-205HLF header_1x5_0p1Pitch60p42d

18 L1 1 8.2µH Wireless power receiver coil ASC-504060E00-S00 sm_135x70

19 RTS 1 NP

NTC2

20 R1, R13, R14 3 5.1kΩ RES SMD 5.1K OHM 5% 1/16W 0402

MCR01MRTJ512 0402

21 R2 1 36Ω RES SMD 36 OHM 5% 1/2W 0805 ERJ-P06J360V 0805

22 R6 1 NP RES SMD 0.0OHM JUMPER ERJ-2GE0R00X 0402

23 R8 1 0Ω RES SMD 0.0OHM JUMPER 1/10W 0402

ERJ-2GE0R00X 0402

24 R15, R16 2 10KΩ RES SMD 10K OHM 1% 1/10W 0603

RC0603FR-0710KL 0603



Item Reference Quantity Value Description Part number PCB Footprint

25 R17, R19, R23, R27, R29, R34, R38, R39

8 10kΩ RES SMD 10K OHM 5% 1/16W 0402

CRCW040210K0JNEDIF 0402

26 R18, R22, R28, R30, R33, R41, R42

7 NP RES SMD 10K OHM 5% 1/16W 0402

CRCW040210K0JNEDIF 0402

27 R35 1 0Ω RES SMD 0.0OHM 1/10W 0603 MCR03EZPJ000 0603

28 U1 1 P9221-R MP Wireless power receiver P9221-R csp52_2p64x3p94_0p4mm

29 U2 1 NP IC EEPROM 128KBIT 400KHZ 8TDFN

24AA128T-I/MNY TDFN08



5. Board Layout

Figure 8. Silkscreen – Top of Board

Figure 9. Silkscreen – Bottom of Board



Figure 10. Top Copper Layer

Figure 11. L2 Copper Layer



Figure 12. L3 Copper Layer

Figure 13. Bottom Copper Layer



6. Ordering Information

Orderable Part Number Description

P9221-R-EVK P9221-R-EVK MM Evaluation Board

7. Revision History

Revision Date Description of Change

December 18, 2017 Updates for V2.2 of the P9221-R-EVK.

Minor edits.

December 19, 2016 Initial release of document.

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DISCLAIMER Integrated Device Technology, Inc. (IDT) and its affiliated companies (herein referred to as “IDT”) reserve the right to modify the products and/or specifications described herein at any time, without notice, at IDT's sole discretion. Performance specifications and operating parameters of the described products are d etermined in an independent state and are not guaranteed to perform the same way when installed in customer products. The information contained herein is provided without representation or warranty of a ny kind, whether express or implied, including, but not limited to, the suitability of IDT's products for any particular purpose, an implied warranty of merchantability, or non -infringement of the intellectual property rights of others. This document is presented only as a guide and does not convey any license under intellectual property rights of IDT or any third parties.

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p9221-r-evk evaluation board user manual

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